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ASTM A890 4A Check Valve

18 products found

An ASTM A890 4A check valve is an automatic non-return valve cast from Grade 4A duplex stainless steel (22% chromium, 5% nickel, 3% molybdenum, and nitrogen), specifically designed to prevent pipeline backflow in aggressive environments. The balanced duplex microstructure combines high mechanical yield strength with outstanding resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. Driven entirely by fluid kinetics, the valve’s disc lifts to clear the flow path under forward pressure and instantly drops flat onto its seat via gravity and reverse pressure when flow ceases. Marine contractors and procurement teams can maximize system longevity and eliminate localized pitting corrosion by sourcing high-integrity ASTM A890 4A check valves straight from specialized manufacturers in China through our commercial B2B platform.

Showing 18 result(s)
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Dual Plate Check Valve, ASTM A890 4A, API 6D, 150 LB, 6 Inch

Bosseal Valves (Suzhou) Co., Ltd.

Dual Plate Check Valve, ASTM A890 4A, API 6D, 150 LB, 6 Inch

Model Number: 1842022

We proudly export high-quality API 6D Dual Plate Check Valves, crafted from durable Duplex Stainless...
ASTM A890 4A Dual Plate Check Valve, 24 IN, CL 150, API 594

Bosseal Valves (Suzhou) Co., Ltd.

ASTM A890 4A Dual Plate Check Valve, 24 IN, CL 150, API 594

Model Number: 1842030

We manufacture high-quality 24-inch dual plate check valves, adhering to API 594 and API 6D standard...
API 594 Dual Check Valve, 48 Inch, 150 LB, ASTM A890 4A

Bosseal Valves (Suzhou) Co., Ltd.

API 594 Dual Check Valve, 48 Inch, 150 LB, ASTM A890 4A

Model Number: 1842038

As a leading API 594 Dual Plate Check Valve manufacturer in China, we offer non-return valves up to ...
6 Inch Dual Check Valve, ASTM A890 4A, 300 LB, API 594, 6D

Bosseal Valves (Suzhou) Co., Ltd.

6 Inch Dual Check Valve, ASTM A890 4A, 300 LB, API 594, 6D

Model Number: 1842043

As a leading factory in China for ASTM A890 4A check valves, we specialize in dual plate designs for...
Duplex Stainless Steel Non-Return Valve, 24 IN, CL 300

Bosseal Valves (Suzhou) Co., Ltd.

Duplex Stainless Steel Non-Return Valve, 24 IN, CL 300

Model Number: 1842051

As a renowned fabricator from China, we specialize in crafting Duplex Stainless Steel Non-Return Val...
ASTM A890 4A Non-Return Valve, API 594, 2 Inch, 600 LB

Bosseal Valves (Suzhou) Co., Ltd.

ASTM A890 4A Non-Return Valve, API 594, 2 Inch, 600 LB

Model Number: 1842060

Our factory in China specializes in manufacturing 2-inch dual plate non-return valves, compliant wit...
API 6D Dual Check Valve, 14 Inch, Class 600 LB, ASTM A890 4A

Bosseal Valves (Suzhou) Co., Ltd.

API 6D Dual Check Valve, 14 Inch, Class 600 LB, ASTM A890 4A

Model Number: 1842068

We are a premier manufacturer of API 6D dual plate check valves, specializing in high-quality non-re...
2 Inch Dual Check Valve, ASTM A890 4A, 900 LB, API 594, 6D

Bosseal Valves (Suzhou) Co., Ltd.

2 Inch Dual Check Valve, ASTM A890 4A, 900 LB, API 594, 6D

Model Number: 1842081

We are a leading factory specializing in ASTM A890 4A check valves, featuring a dual plate design fo...
Duplex Stainless Steel Non-Return Valve, 14 IN, CL900, 4A

Bosseal Valves (Suzhou) Co., Ltd.

Duplex Stainless Steel Non-Return Valve, 14 IN, CL900, 4A

Model Number: 1842089

As a leading fabricator of duplex stainless steel non-return valves, we offer top-quality products w...
Spring Loaded Dual Check Valve, 2 IN, 1500 LB, ASTM A890 4A

Bosseal Valves (Suzhou) Co., Ltd.

Spring Loaded Dual Check Valve, 2 IN, 1500 LB, ASTM A890 4A

Model Number: 1842102

As a premier manufacturer of ASTM A890 4A dual plate check valves, we offer high-quality solutions f...
ASTM A890 4A Check Valve, 14 Inch, CL 1500 LB, API 594

Bosseal Valves (Suzhou) Co., Ltd.

ASTM A890 4A Check Valve, 14 Inch, CL 1500 LB, API 594

Model Number: CV-20240816-07

Our 14-inch duplex stainless steel check valve, crafted from ASTM A890 4A material, meets API 594 an...
Spring Loaded Dual Check Valve, 2 IN, 2500 LB, ASTM A890 4A

Bosseal Valves (Suzhou) Co., Ltd.

Spring Loaded Dual Check Valve, 2 IN, 2500 LB, ASTM A890 4A

Model Number: CV-20240816-09

As a leading manufacturer of dual plate check valves from China, we specialize in valves made from A...
Flanged Check Valve, A890 4A, 14 IN, 2500 LB, API 6D, 594

Bosseal Valves (Suzhou) Co., Ltd.

Flanged Check Valve, A890 4A, 14 IN, 2500 LB, API 6D, 594

Model Number: CV-20240816-18

As a leading API 6D dual plate check valve supplier from China, we offer top-quality non-return valv...
ASTM A890 4A Swing Check Valve, API 6D, 8 IN, CL900, BB, RTJ

Zhejiang Kosen Valve Co., Ltd.

ASTM A890 4A Swing Check Valve, API 6D, 8 IN, CL900, BB, RTJ

Model Number: KV-20250224-SCV-01

The ASTM A890 4A Swing Check Valve is designed to API 6D standards, featuring a duplex stainless ste...
ASTM A890 4A Swing Check Valves, BS 1868, 6 Inch, CL600, RF

Zhejiang Kosen Valve Co., Ltd.

ASTM A890 4A Swing Check Valves, BS 1868, 6 Inch, CL600, RF

Model Number: KV-20250514-SCV-01

The ASTM A890 4A Check Valves Supplier offers high-performance swing type check valves designed to m...
ASTM A890 4A Check Valve, API 594, DSS, DN200, PN16, Wafer

topper

ASTM A890 4A Check Valve, API 594, DSS, DN200, PN16, Wafer

Model Number: VPSK-20250521-CV-01

The ASTM A890 4A Check Valve Plant in China offers high-quality wafer check valves designed in accor...
ASTM A890 4A Wafer Check Valve, API 594, 30 Inch, Dual Plate

XIAMEN LANDEE INDUSTRIES CO., LTD.

ASTM A890 4A Wafer Check Valve, API 594, 30 Inch, Dual Plate

Model Number: LD-20250612-CV-01

The API 594 Wafer Check Valve Manufacturer specializes in producing high-quality dual plate check va...
API 594 Dual Plate Check Valve, ASTM A890 4A, 30 Inch, Wafer

XIAMEN LANDEE INDUSTRIES CO., LTD.

API 594 Dual Plate Check Valve, ASTM A890 4A, 30 Inch, Wafer

Model Number: LV-CKV-20250617-04

As a trusted dual plate check valve supplier, we provide high-performance valves manufactured to API...
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